diff --git a/google_analytics/models.py b/google_analytics/models.py
index cbf80dc..6f477bf 100644
--- a/google_analytics/models.py
+++ b/google_analytics/models.py
@@ -4,7 +4,7 @@
 
 class Analytics(models.Model):
     site = models.ForeignKey(Site)
-    analytics_code = models.CharField(blank=True, max_length=100, core=True)
+    analytics_code = models.CharField(blank=True, max_length=100)
 
     def __unicode__(self):
         return u"%s" % (self.analytics_code)